Combined cutting-pliers and punch



(No Model.)

J. THOMSON.

GQMBINED CUTTING PLIERS AND PUNCH. N0.-Z83,833. Patented Aug. 28, 1883.

UNITED I STATES PATENT OFFICE.

JOHN THOMSON, OF HARTFORD, CONNECTICUT.

COMBINED CUTTING -PLIERS AN D" PUNCH.

SPECIFICATION forming part of Letters Patent No. 283,833, dated August28, 1883.

Application filed June 9, 1883. (No model.)

Be it known that I, JOHN THoMsoN, of

Hartford, in the county of Hartford and. State of Connecticut, haveinvented certain new and useful Improvements in Combined Cutting-]?liers and Punch; and I do hereby declare that the following is a full,clear, and exact description thereof, whereby a person skilled in theart can make and use the same, reference being had to the accompanyingdrawings, and to the letters of reference marked thereon.

Like letters in the figures indicate the same parts.

Figure 1 is a front view of my improved cutting-pliers. Fig.2isasideview of same. Fig. 3 is a back view of same. Fig. 4. is atopview of same. Fig. 5 is a view in cross-section on the plane denoted byline at a: of Fig. 6. Fig. 6 is a back view. of my device with the plateremoved. Fig. 7 is a back view of my device, showing the punch, whichhas been omitted from previous views to prevent confusion. Fig. Sis atop view of the complete tool shown in Fig. 7.

My invention relates to the class of cutting pliers adapted for use withremovable cuttingblades; and it consists in the peculiar arrangement ofthe blades upon projecting shafts; in the combination of the lever-armsprovided with segmental gears and handles, and in other details moreparticularly hereinafter described.

In the accompanying drawings, the letter a denotes the main body or caseof the pliers as a whole, pivoted in which are the short leverarms I) cand the lever-handles d e. The short shafts f are shouldered to form abearing against the face of plate g, through which plate and theopposite rear plate, h, the reduced part f of the shafts pass, and inwhich plates they are so seated as to permit rotation. The part f ismade square in section between the inner faces of the plates and uponthis squared portion fits the upper ends of the shaft-arms Z) 0. Thesearms are provided for a certain distance 011 their inner edges withsegmental gears j j, which intermesh. At the opposite edges of the case,at its lower side, are pivoted the lever-handles d 6, between theplates, in such manner that their short arms reach upward between thelower ends of the shaft-arms and engage them, so that by pushing thelever-handles inward the shafts are rotated through the medium of theintermediate shaft, arms. In the upper side of the projecting part ofeach of the short shafts a socket is made in which is fitted acutting-blade, m, fastened by means of the screw passing radiallythrough the blade into the shaft. The rear side of the blade fitsclosely against the side of the socket in the shaft and is thus firmlybacked up in cutting. The cutting is effected by the rotation of theshafts, which forces the out ting-edges of the blades together with apeculiar rolling motion, which aids in the work. To the front of thecase a gage, a, having an upturned shoulder, is adjustably attached bymeans of a screw passing through a slot in the gage, and by means ofthis gage the lengths of pieces cut by the pliers may be determined andkept constant. The arrangement of the blades upon the projecting shaftsenables the tool to be used in cutting from sheets of metal or from wireand the like with equal advantages,and the intermeshing segmental gearsupon the shaftarms serve to move the blades simultaneously with auniform motion and give an even cut. Aspring, 0, is secured to theshaftarms in such manner as to tend to keep the blades apart as theirnormal position.

In Figs. 7 and 8 I show the special feature of my invention, that addsgreatly to its utility and efficiency as a bench-tool for use injewelers and other light work. The reduced part f of either shaft isextended beyond the face of the back plate, and a finger or lug, 0',secured to it in such position as to extend into a mortise in the edgeof the sliding bolt 3, which is seated so as to move freely in thesocket t fast to the back plate. The forward end of the bolt works inconnection with the die a, also fast to the back plate in properposition, in line with the bolt, and the whole forms a punch that isuseful in forming holes in thin metalas inwatch-sp rings and the like.The punch is operated by the handles, the same mediums as the blades,which are also fast to the rotary shaft, as the rotation of the I claimas my invention shaft causes the bolt 8 to slide back and forth.

IOO

1. In combination, the case bearing the projecting rotary shafts havingcutters, the shaftarms, having intermeshing segmental gears, and thelever-handles pivoted to the case, all

5 substantially as described.

2. In combination, the case bearing the projecting rotary shafts withremovable cuttingblades and operating-levers, all substantially asdescribed;

IO 3. In combination, the cutting-pliers, having laterally-proj ectingblades, and the adj ust- .able gage, attached to the case or body of thepliers, all substantially as described.

' 4. In combination, the case, the rotary shafts I 5 bearing thecutting-blades, and the shaft-arms having intermeshing segmental gears,all substantially as described.

5. In combination, case a, shafts f, blades m, finger 1", fast to theshaft, sliding bolt 8, die a, and the operating-levers, allsubstantially 20 as described.

6. In combination, the lever-handles, the case a, bearing the rotaryshafts f, having on opposite ends the cutting-blades and punch, and theintermediate shaft-arms, all substan- 25 tially as described.

' JOHN THOMSON.

Witnesses:

CHAS. L. BURDETT, EDWIN F. DIMOOK.

